Selective drive for excavating machines



06L 1931- V w. HARNISCHFEGER 1,826,466

SELECTIVE DRIVE FOR EXCAVATING MACHINES Filed March 29, 1928 2 Sheets-Sheet 1 INVENTOR.

A TTORNEYS.

Oct; 6, 1931. w. HARNISCHFEGER 1,326,466

4 ISELECTIVE DRIVE FOR EXCAVA'IIING MACHINES Filed March' 29, 1928 2'Sheets-Sheat 2 50 F 7 v v 20 o 1 IN V EN TOR.

flu

h P atented Oct. 6, i

SELECT-IVE DRIVE r03 E XGAVATItTG MACHINES;

' Application file'd March 29, 1923." Serial No. 265,760. A,

This invention relatesv to general to excavatin'g machinery and more particularly to to a selective drive control'for such machines.

Excavating machines, suchas power shovels, pow er lioes, and the'like have their various 'instrumentalities such as their drums, swmg'gear'and traction means drlven from a single power plant whichfrequentlypinithe modern type of machine, isa gasoline'engine,

Diesel engine or other type. of internal com I bustion-engine j In se ne localitiesand in the construction of'subwayftunnels and the like,

it is impracticalor dangerous to use-an internalfcombustionfen'gine, fas the exhaust gases eonst tute a menace to'health' and life.

Under suchieircumstances, it becomes desirable to employ a poiwer planto f the type of anclectric motor. f

Oneofthe principal obj'ectsof thepresent invention is to .p' rovide' an excavating machine iwhi'ch may selectively employ-as its power plant, either an internal fcombustio'n engine or an electricinotor. In'other werds,

two different types of power plantare' pro vided and either may be used'to actuate" the various instrumentalitiesof this-machine I Another object of 'thefpresent invention resides inthej rovision of a novel'drive control whereby either type of power plant may be brought intoactionby simply manipulat ing a control lever common to the two" power plants and operable-"to disconnect; either power plant fromthe'instrumentalitiesof the machine, or to connect either power plant selectively thereto. j:

' Another object of the invention resides in the provision of a selective drive control of this character which is of'simple and durable construction. reliable and effective in operation and easy to operate.

Other objects and advantages reside in certain, novel features of the construction,

arrangement and combination of parts which will be hereinafter more fully described and particularly pointed out in the appended claim, reference being had to the accompanying drawings forming a part'of this specification, and in which:

Figure 1 is a fragmentary plan view showingthe invention applied to an excavating machine parts being brokenaway for the sake of illustration igure 2 is a view in side elevation of the parts shown in Figure FigureB is a'view infront elevation look-- ing toward the left hand side 'of'Figure 1, parts being brokenaw'ay and parts being shown in section along line 33 of Figure l for the sakeof illustration, and

Figure 4 is a detail view 'ofthe control mechanism removed from] the power plants; Referring to the drawings,fthe numeral WALTER HARNIsorrFEGEIg-os MILWAUKEE; WISCONSIN, ASSIGNOR T0 HARNISCH- FEGER CORPOBATIQN, 'OF MILWAUKEE, Wisconsin, A CORPORATION OF WISCONSIN l'designates diagrammatically a portion of the'revolving platform of an excavating machine which may be a powerfshovel or any other type of excavating machine. on

this platform, an internal combustion engine is provided and a portion of such engine is designated at 2. An electric motor 3is also mounted on the platform. It; isproposed to selectively drive the instrumentalities, of

the machine from theinternal combustion engines or from theelectric motor 3. The drive is imparted toa large geanwheel 4 which is connected to the various instrumentaliti'es in'the usual way. i

In carrying out this purpose, the engine shaft 5 of the internal combustionengine 2 has a pinion 6 loosely mounted thereon and constantly meshingwith the large gear wheel" t of the-excavating machine. This pinionI 6'has a jaw clutch member 7 integral therewith orrig idly connected thereto. A

driving j aw ,i clutch member 8 is splined "on the engine shaft 5 and is adapted toengage or interfitiwith thefjaw clutch member?. to connect" the pinion 6 to ,the engine shaft 5 and thereby'a'ctuate the gearft from the .internal combustion engine l T 'The electricmotor 3 has anarmature shaft 10 on" which a pinion 11 loosely mounted, the pinion} 11 constantlymeshing with. the gear wheel 4n. a pointrspa'ced from the-pin ions. ,This pinion 11 has a jaw clutch member12integral therewithor rigidly con: nected thereto and adaptedtoengage lor interfit with a similar driving jaw clutch member',13 splined on the armature shaft 10' and operable when engaged with thejaw,

clutch member 12 to constrain the pinion 11' itofrotatel With the arrnature shaft and nsequently to driveth ar from the electric motor."

these clutch members as to'perrnit either, but not both, to he engaged with their e0 operableclutch menibersas Well as to permit both slidingelutehgmembersto iheidisiengagedg Inearrying out thisvpurpose, the, clutch '1nember'8 has .a grooved hiib which receives'the areuate trnnnion 'bleeks l6J -of --a V the excavating machinef tegrally formed withthe -loearing ineniber lgiwhich is fixedto ashifter shaft 19 j'ourg shifter fork 17, the shifter fork 17 being infialed. in 'bearing' brackets 20 provided on the-revolving platformfof jthe' n1achine.-- 1

' Similarly the sliding; clutch memberie has 7 a grooved hub 2 1 receiving the'arnatetrun- 7 nion blocks 22 of 'a s' 'hifter fork 23 integrally Y forined on a'so ok e-t' bearing member-24L which receives: one end of a "shiftersha ft. 25 john naledin a bearing 26 formed on an extension 27-of one ofthe flirae'ke ts' 20.) The shafts-19 "and 25 are conn'ected'or{linked together so 1 'ordinatedin'oti'ons"andgth'is oonneetion of'the shafts 'is feife cted hy fseeuring crankfarnis 28 I and29 tbtheshaftsl9 and 25, respectively;

and "pivotally conneeting' the ends 'ofvth ese Crank armsitosthe ofi-an adjustalole link cteristies of a rigid inextensible single eoiitrol leveflfdesigiieted 35',

-- shaft 19 adjacent onej'of the bearings 20 d leas'ablyihoflding it'in'any one of its three p05 'si-t'ions" and for this purpose, a [segmental plate 36 maybe secured to the adjacent-hearin'g'QOfand ma jhave three sp'aeedisockets o l reeessesgf' 3 7' With IWhiCh spring; pressed 'Ii'lim gf i lon the lever releasablyengagesto V 1 preventia'ccidental displacement ofthe leverf A portion of a gear casing is shown at 50in :7 as the shaft 1 9 is turned inl'a clockwise dierection" as viewed in Figure 3 and similarly rotates the shifter 17., The crank arm 28 a partakes of this motion of the shaft 19 and acts through the link to rotate the crank arm 29 and the shaft25 in a coi1nter olock- V wisjle 'directionns vievved Figure thereby causing the shifter fork 23 to s1ideth e cl1iteh member 13 to the left as viewed 'in Figu re 3an-d into engagement With-the 'cluteh-mem- 7 her 12. 'Thisleonneets the .pini'on'l'l to-ithe armature shaft 10 and provides an operative connection betweentheeleetric motor and :mpmioer T'vvliile the icllitch member; 13 is 1;

nioved to theright esvmwean1ergm13 :and'avvay: from its glu en ineinberQlQ-J A t such time the internal co nbustion engine is o,peratively connectedxto'the exeavatingrma- FIclaiin: Q 1-. r p f In van excavating machine .of -the' typeihav ing ,aiplatforrn; an, internal 'eomhustion engine nounted on flieplatforin andhaving an engine: sh aft, and an electrie maimed 1 on the platform and having an, annature shaft, .ineans1 for selectively driving the instrumentalities of the excavating llIl fLQhine from the engine shaft or the :a'rn iatore shaft and oomprising a ,pinion looselygnionnted'on 1 th eng e SL m' liItd fQn e e llns' the i n n iel h n shee l'p ni n oos y nibnnted on the armatnreishaft, aeliitch for V eonnectingthe pinion to theiarmatnre shaft, a

se W eel 11 h xee ingd s hi e wit whiehl'tlie pinions' constantly ineslilla" single control ineniber, and ineans between the control member and thefelut ches foroai sing one clutohtobe disengaged-When tlieother is :en-

gaged whereby the'gearwheel may be driven selectively said internal combustion engine 'Or byfsaid-e-lectrie motor. 'i

, In witness whereof, I hereto nature.

' i WA TER HARNISCHFEGER;

e Figi freB' an d'is outlined di'agraniinatioally inFigur'es 1 and '2.

' ysitionedasshovvn infullwlines in Eiglire'fi,

this controlivvhentheileverfj i from [their respective -f oo-operable iClIltCh oftlie control'land at such time the gear 7 1s not driven -from'.j either [of the power chine and the ele ctrioniotorisdiseonneeted, .1 

